@misc{indiciae00e8e9941d6c,
  title = {Estimation of walrus populations on sea ice with infrared imagery and aerial photography},
  author = {Mark S. Udevitz and D. M. Burn and M.A. Webber},
  year = {2007},
  doi = {10.1111/j.1748-7692.2007.00169.x},
  url = {https://pubs.usgs.gov/publication/70033756},
  note = {Source identifier: 70033756}
}